Three plus twelve multiplied by four
Answer:
y = -4x + 8 its a negative function but it is linear
Step-by-step explanation:
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Slope (m) = ΔYΔX= -4
1= -4
θ = arctan( ΔY ) + 360°
ΔX= 284.03624346793°
ΔX = 2 – 0 = 2
ΔY = 0 – 8 = -8
Distance (d) = √ΔX2 + ΔY2 = √68 = 8.2462112512353
Equation of the line:
y = -4x + 8
When x=0, y = 8
When y=0, x = 2
Answer:
50 % alcohol solution = 10 millimetres
30 % alcohol solution = 90 millimetres
Step-by-step explanation:
two equations can be derived from this question
x + y = 100 equation 1
0.3x + 0.5y = 100 x 0.32 = 32
0.3x + 0.5y = 32 equation 2
where :
x = 30% alcohol solution
y = 50% alcohol solution
multiply equation 1 by 0.3
0.3x + 0.3y = 30 equation 3
subtract equation 3 from 2
0.2y = 2
y = 10
substitute for y in equation 1
x + 10 = 100
x = 100 - 10
x = 90